Engine water pump

Abstract

The utility model discloses an engine water pump, which relates to the technical field of motorcycles and comprises a pump body and a magneto cover, the magneto cover is arranged on the front side of the surface of a cylinder body, a mounting hole is arranged on the magneto cover, the pump body is connected with the mounting hole and is directly arranged on the cylinder body, a balance shaft is arranged in the cylinder body, and the pump body is connected with the balance shaft. A water pump body is directly installed on the surface of an engine cylinder body through a magneto cover, and a balance shaft penetrates through an installation hole in the magneto cover to be connected with the pump body. And the power source drives the balance shaft to further drive the impeller to rotate in a cavity formed by the pump body and the mounting hole. The pump body is directly connected with the cylinder body through the magneto cover and is directly driven by the balance shaft in the cylinder body, the whole structure is simple, the step mode is compact, and the size and the manufacturing cost of the engine cylinder body are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycles, in particular to an engine water pump. Background Art

[0002] The existing motorcycle engine cooling water pump is assembled on the engine cylinder, but the existing connection method between the water pump and the engine is relatively complicated and occupies a large space, requiring more space in the engine to accommodate it, and the connection method between the water pump and the inside of the engine cylinder is also relatively complicated. Therefore, a new motorcycle engine water pump connection method is urgently needed to solve the above problems.

[0003] Chinese patent document CN102072005A discloses a "motorcycle engine cooling water pump and a motorcycle engine with the water pump". The water pump at least includes a pump body, a pump cover, a pump shaft, an impeller and a pump chamber. The water inlet and outlet pipes of the water pump are connected to the pump chamber. The axis of the pump shaft is perpendicular to the mounting end surface of the pump body and the pump cover and is rotatably mounted in the pump body. One end of the pump shaft is the power input end of the water pump, and the other end is used to mount the impeller in the pump chamber. The water pump is characterized in that the pump body is independent of the motorcycle engine, the pump body is in the shape of a straight tube, and one end of the pump body is provided with a mounting plate connected to the pump cover by bolts. However, the connection structure between the water pump and the engine is relatively dispersed, which increases the cost of manufacturing the engine water pump part and reduces the connection strength between the water pump and the engine. Summary of the invention

[0004] The utility model mainly solves the technical problems that the connection structure between the original engine water pump and the engine is not compact enough and the manufacturing cost is high. It provides an engine water pump, a magneto cover is arranged on the surface of the engine cylinder body, and a pump body of the water pump is installed on the magneto cover, and the pump body is directly connected to the cylinder body through the mounting hole on the magneto cover. The pump body is connected to the balance shaft in the cylinder body through the mounting hole.

[0005] The above technical problems of the utility model are mainly solved by the following technical solutions: the utility model comprises a pump body and a magneto cover, the magneto cover is arranged on the front side of the cylinder surface, the magneto cover is provided with a mounting hole, the pump body is connected with the mounting hole and directly mounted on the cylinder, a balance shaft is arranged in the cylinder, the pump body is connected with the balance shaft. The pump body of the water pump is directly connected to the engine cylinder, which ensures the connection strength between the pump body and the engine while also reducing the space occupied by the pump body and the engine.

[0006] Preferably, a cavity is provided at the connection between the pump body and the installation port, an impeller is provided in the chamber formed by the cavity and the installation port, and a water inlet is also provided on the surface of the pump body. The impeller rotates in the chamber to drive the antifreeze liquid to circulate.

[0007] Preferably, a driving wheel is provided at one end edge of the balancing shaft, a driven wheel is provided above the driving wheel to mesh with the driving wheel, and a driven shaft is installed at the center of the driven wheel. The balancing shaft drives the driving wheel to operate under the power source, and the driving wheel drives the driven wheel matched with it to operate.

[0008] Preferably, a water inlet is provided on one side of the mounting hole, and a water outlet is provided on the other side, and the water outlet and the water inlet are connected to the pump body. Operation process of the water pump: the antifreeze is divided under the action of the impeller, enters the engine cylinder from the water inlet, and flows out of the engine from the water outlet to complete the cooling cycle.

[0009] Preferably, the cross-sectional diameter of the driven shaft at one end away from the driven wheel is smaller than the cross-sectional diameter of the end close to the driven wheel, one end of the driven shaft is plugged into the center of the driven wheel, and the other end is plugged into the center of the impeller. The driven shaft is plugged into the center of the impeller, so that the balancing shaft drives the impeller to operate.

[0010] Preferably, a water circulation part is provided on the side of the cylinder body, the water circulation part includes a plurality of water pipes and a cooling assembly, a crankcase is provided between the water circulation part and the water pump, and the water pump is connected to the water circulation part via the crankcase. The water pump, the water circulation part and the crankcase constitute the entire cooling cycle.

[0011] Preferably, a transmission wheel is provided at the other end of the balancing shaft, and the transmission wheel is arranged below the waterway pipeline.

[0012] Preferably, the magneto cover is provided with a plurality of fastening openings at its edge, and fasteners are arranged in the fastening openings to connect the magneto cover to the cylinder body. The magneto cover is fixed to the surface of the engine cylinder body through the plurality of fastening openings, ensuring the compactness and firmness of the connection between the magneto cover and the engine cylinder body.

[0013] The beneficial effects of the utility model are as follows: in this patent, the water pump body is directly mounted on the surface of the engine cylinder body through the magneto cover, and the balance shaft is connected to the pump body through the mounting hole on the magneto cover. The power source drives the balance shaft and then drives the impeller to rotate in the cavity formed by the pump body and the mounting hole. In this patent, the pump body is directly connected to the cylinder body through the magneto cover, and is directly driven by the balance shaft in the cylinder body. The overall structure is streamlined, the steps are compact, and the size of the engine cylinder body and the manufacturing cost are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a structural diagram of an engine cylinder block.

[0015] Figure 2 It is an exploded view of a water pump of the utility model.

[0016] Figure 3The utility model is a connection structure diagram of a water pump and a water circulation part.

[0017] In the figure, 1. cylinder block, 2. magneto cover, 3. pump body, 4. crankcase, 5. mounting hole, 6. water inlet, 7. water outlet, 8. driving wheel, 9. driven shaft, 10. driven wheel, 11. balance shaft, 12. water circulation part, 13. transmission wheel. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is further specifically described below through embodiments and in combination with the accompanying drawings. Embodiment 1: An engine water pump of the present embodiment. Most existing water pumps are directly connected to the engine cylinder block 1, but the layout only takes into account the connection between the water pump and the surface of the engine cylinder block 1. The connection method of the water pump extending to the inside of the engine cylinder block 1 is still relatively cumbersome and complicated, which expands the occupied space in the engine cylinder block 1, thereby increasing the size of the engine. At the same time, the larger space layout makes the connection between the entire engine and the water pump not compact enough, affecting the connection strength between the two. In this embodiment, Figure 1 and Figure 2 As shown, a magneto cover 2 is installed on the front side surface of the motorcycle engine cylinder body 1, and a plurality of fastening openings are arranged around the edge of the magneto cover 2. A hole is also arranged on the surface of the engine cylinder body 1 corresponding to the magneto cover 2. Fasteners are used to pass through the fastening openings on the edge of the magneto cover 2 and the holes on the surface of the engine cylinder body 1 to fix the magneto cover 2 on the front side surface of the engine cylinder body 1. A mounting hole 5 is arranged on the upper left of the magneto cover 2, and the matching part of the engine cylinder body 1 and the magneto cover 2 is also dug synchronously. A through hole is arranged on the left side of the mounting hole 5 as a water inlet 6, and a through hole is arranged on the right side of the mounting hole 5 as a water outlet 7. A pump body 3 of a water pump is installed covering the mounting hole 5, the water inlet 6 and the water outlet 7. A cavity is arranged at the connection between the pump body 3 and the mounting hole 5. An impeller is arranged in the chamber formed by the cavity and the mounting hole 5. A fixed shaft extends through the center of the impeller, and one end of the fixed shaft is connected to the cavity of the pump body 3. A cylindrical water inlet pipe is provided at the pump body 3 away from the surface of the engine cylinder 1, and a water inlet 6 is provided at the center of the water inlet pipe and extends into the chamber. The other end of the fixed shaft at the center of the impeller is sleeved with the driven shaft 9 at the center of the driven wheel 10, and the driven shaft 9 is arranged at the center of the driven wheel 10, and the driven wheel 10 is meshed and connected with the driving wheel 8 below. A through hole is provided at the center of the driving wheel 8, and a balancing shaft 11 is inserted into the through hole. The balancing shaft 11 extends into the engine cylinder 1 and is connected to a transmission wheel 13. The transmission wheel 13 is arranged below the water circulation part 12.

[0019] The power source drives the balancing shaft 11 to operate, and the balancing shaft 11 transmits kinetic energy to the driving wheel 8 set at one end edge. The driving wheel 8 rotates along with the rotation of the balancing shaft 11, and the driven wheel 10 directly meshed with the driving wheel 8 rotates synchronously with the rotation of the driving wheel 8, and the diameter of the driven wheel 10 is larger than the diameter of the driving wheel 8. The driven shaft 9 set at the center of the driven wheel 10 rotates with the driven wheel, and the driven shaft 9 takes the center of the driven wheel 10 as the base point and extends parallel to the center of the impeller. So far, the above-mentioned balancing shaft 11, driving wheel 8, driven wheel 10, driven shaft 9, water inlet 6, water outlet 7, impeller and pump body 3 constitute an antifreeze separation system. The driving wheel 8 with a small diameter drives the large diameter driven wheel to rotate, which can give the impellers of the driven and balancing shafts 11 a greater rotational momentum, thereby increasing the flow rate of the antifreeze diverted to the water inlet 6 and water outlet 7 on both sides of the impeller within the same time limit.

[0020] The water pump extends into the engine cylinder 1 with the pump body 3 on the surface of the engine cylinder 1 as the base point, thereby connecting the crankcase 4 and the water circulation part 12. Figure 1 and Figure 3 As shown, the crankcase 4 is connected to the pump body 3, and the pump body 3 is arranged on the right side of the crankcase 4. The crankcase 4 is close to the front surface of the engine cylinder body 1 and is parallel to the pump body 3. The top of the crankcase 4 is provided with a crankcase 4 end cover, and a water outlet pipe extends from the surface of the end cover, and a water outlet 7 is arranged in the center of the pipe. The crankcase 4 extends into the engine cylinder body 1 and is connected to a water circulation part 12, which includes a plurality of water pipes and cooling components, and the crankcase 4 is connected to the plurality of water pipes. The antifreeze in the water pipe is transmitted to the crankcase 4 for diversion, and another part of the antifreeze flows through the water pump and is diverted to the water inlet 6 and the water outlet 7 at the impeller. The antifreeze at the water inlet 6 passes through the crankcase 4 and enters the water circulation part 12 for circulation to cool the engine cylinder body 1. Therefore, the water circulation part 12, the crankcase 4 and the water pump constitute a large circulating water circuit to cool the heat generated by the engine cylinder body 1.

[0021] In actual use, the power source acts on one end of the transmission shaft connected thereto, causing the entire transmission shaft to rotate. The rotation of the transmission shaft directly causes the driving wheel 8 connected to the other end of the transmission shaft to rotate. The driven wheel 10 meshing with the driving wheel 8 rotates with the driven shaft 9 as the rotation center under the drive of the driving wheel 8, and the momentum is transmitted through the driven shaft 9 to drive the impeller to rotate. When the antifreeze enters the engine cylinder 1 from the water inlet of the pump body 3 and flows to the mounting hole 5, it is diverted under the action of the impeller, and part of the antifreeze is transmitted from the water inlet 6 to the crankcase 4. After further diversion at the crankcase 4, it enters different water pipes in the water circulation part 12. The antifreeze flows in the water pipes to reduce the temperature of the engine cylinder 1. The antifreeze liquid that flows through the water circulation part 12 reaches the crankcase 4, and then flows through the crankcase 4 and then flows out from the water outlet 7. The antifreeze liquid flows under the action of the water pump, and the antifreeze liquid cools the engine cylinder 1 under the joint action of the crankcase 4 and the water circulation part 12. In this embodiment, the pump body 3 of the engine water pump is directly fastened to the front surface of the cylinder 1 through the magneto cover 2, and the engine cylinder 1 is placed in the motorcycle. The arrangement of the pump body 3 at this position can reduce the space occupied by the engine cylinder 1 and reduce the space occupied by the engine. At the same time, the balance shaft 11 is extended and connected to the cylinder 1 with the reference surface of the pump body 3. The balance shaft 11 is driven and drives the impeller to rotate, so that the water pump drives the antifreeze liquid to flow and flow at the water inlet 6 and the water outlet 7. In the engine cylinder 1, the balance shaft 11 is arranged in the gap at the bottom of the cylinder 1, making full use of the gap in this part and improving the utilization rate of the space. The driving wheel 8, the driven wheel 10 and the impeller are closely connected to each other and are arranged as a whole in the chamber formed by the mounting hole 5 and the cavity of the pump body 3, further reducing the space occupancy rate. Outside the engine cylinder body 1, the magneto cover 2 is installed on the front surface of the cylinder body 1, and the pump body 3 is installed on the surface of the engine cylinder body 1 in close contact with the magneto cover 2, reducing the contour extension of the entire engine cylinder body 1. In this embodiment, the installation method of the water pump inside and outside the engine cylinder body 1 not only realizes the compactness of the installation structure, the connection method between different components of the water pump is simple, but also reduces the installation cost of the water pump installed on the engine cylinder body 1.

[0022] Embodiment 2: In this embodiment, the arrangement of the water pump on the engine cylinder block 1 is substantially the same as that in Embodiment 1. Figure 1 and Figure 2As shown, a magneto cover 2 is installed on the front side surface of the motorcycle engine cylinder body 1, and a plurality of fastening openings are arranged around the edge of the magneto cover 2. A hole is also arranged on the surface of the engine cylinder body 1 corresponding to the magneto cover 2. Fasteners are used to pass through the fastening openings on the edge of the magneto cover 2 and the holes on the surface of the engine cylinder body 1 to fix the magneto cover 2 on the front side surface of the engine cylinder body 1. A mounting hole 5 is arranged on the upper left of the magneto cover 2, and the matching part of the engine cylinder body 1 and the magneto cover 2 is also dug synchronously. A through hole is arranged on the left side of the mounting hole 5 as a water inlet 6, and a through hole is arranged on the right side of the mounting hole 5 as a water outlet 7. A pump body 3 of a water pump is installed covering the mounting hole 5, the water inlet 6 and the water outlet 7. A cavity is arranged at the connection between the pump body 3 and the mounting hole 5. An impeller is arranged in the chamber formed by the cavity and the mounting hole 5. A fixed shaft extends through the center of the impeller, and one end of the fixed shaft is connected to the cavity of the pump body 3. A cylindrical water inlet pipe is provided at the pump body 3 away from the surface of the engine cylinder body 1, and a water inlet 6 is provided at the center of the water inlet pipe and extends into the chamber. After the magneto cover 2 is installed on the engine cylinder body 1, a raised platform is formed. There is a height difference between the raised platform and the horizontal plane on the front side of the engine cylinder body 1. The thickness of the magneto cover 2 at the installation location of the pump body 3 and the engine cylinder body 1 is relatively thin. After the pump body 3 is installed on the engine cylinder body 1 via the magneto cover 2, it is roughly at the same level as the raised platform. In this embodiment, when the pump body 3 is installed, the water inlet pipe on the surface of the pump body 3 is installed along the edge of the raised platform, that is, the water inlet pipe is parallel to the edge of the raised platform and has the same height. By installing in this way, the water inlet pipe and the raised platform of the pump body 3 are both confined to the area on the surface of the engine cylinder body 1, and the extension of the water inlet pipe on the pump body 3 will not exceed the horizontal area on the front side of the engine cylinder body 1, further reducing the space occupied by the pump body 3 arranged on the surface of the engine cylinder body 1, and improving the compactness of the arrangement structure between the engine cylinder body 1 and the water pump. The other end of the fixed shaft at the center of the impeller of the pump body 3 is sleeved with the driven shaft 9 at the center of the driven wheel 10. The driven shaft 9 is arranged at the center of the driven wheel 10. The driven wheel 10 is meshed and connected with the driving wheel 8 below. A through hole is arranged at the center of the driving wheel 8. A balance shaft 11 is inserted into the through hole. The balance shaft 11 extends into the engine cylinder body 1 and is connected with a transmission wheel 13. The transmission wheel 13 is arranged below the water circulation part 12.

[0023] The power source drives the balancing shaft 11 to operate, and the balancing shaft 11 transmits kinetic energy to the driving wheel 8 set at one end edge. The driving wheel 8 rotates along with the rotation of the balancing shaft 11, and the driven wheel 10 directly meshed with the driving wheel 8 rotates synchronously with the rotation of the driving wheel 8, and the diameter of the driven wheel 10 is larger than the diameter of the driving wheel 8. The driven shaft 9 set at the center of the driven wheel 10 rotates with the driven wheel, and the driven shaft 9 takes the center of the driven wheel 10 as the base point and extends parallel to the center of the impeller. So far, the above-mentioned balancing shaft 11, driving wheel 8, driven wheel 10, driven shaft 9, water inlet 6, water outlet 7, impeller and pump body 3 constitute an antifreeze separation system. The driving wheel 8 with a small diameter drives the large diameter driven wheel to rotate, which can give the impellers of the driven and balancing shafts 11 a greater rotational momentum, thereby increasing the flow rate of the antifreeze diverted to the water inlet 6 and water outlet 7 on both sides of the impeller within the same time limit.

[0024] The water pump extends into the engine cylinder 1 with the pump body 3 on the surface of the engine cylinder 1 as the base point, thereby connecting the crankcase 4 and the water circulation part 12. Figure 1 and Figure 3 As shown, the crankcase 4 is connected to the pump body 3, and the pump body 3 is arranged on the right side of the crankcase 4. The crankcase 4 is close to the front surface of the engine cylinder body 1 and is parallel to the pump body 3. The top of the crankcase 4 is provided with a crankcase 4 end cover, and a water outlet pipe extends from the surface of the end cover, and a water outlet 7 is arranged in the center of the pipe. The crankcase 4 extends into the engine cylinder body 1 and is connected to a water circulation part 12, which includes a plurality of water pipes and cooling components, and the crankcase 4 is connected to the plurality of water pipes. The antifreeze in the water pipe is transmitted to the crankcase 4 for diversion, and another part of the antifreeze flows through the water pump and is diverted to the water inlet 6 and the water outlet 7 at the impeller. The antifreeze at the water inlet 6 passes through the crankcase 4 and enters the water circulation part 12 for circulation to cool the engine cylinder body 1. Therefore, the water circulation part 12, the crankcase 4 and the water pump constitute a large circulating water circuit to cool the heat generated by the engine cylinder body 1.

[0025] In actual use, the power source acts on one end of the transmission shaft connected thereto, causing the entire transmission shaft to rotate. The rotation of the transmission shaft directly causes the driving wheel 8 connected to the other end of the transmission shaft to rotate. The driven wheel 10 meshing with the driving wheel 8 rotates with the driven shaft 9 as the rotation center under the drive of the driving wheel 8, and the momentum is transmitted through the driven shaft 9 to drive the impeller to rotate. When the antifreeze enters the engine cylinder 1 from the water inlet of the pump body 3 and flows to the mounting hole 5, it is diverted under the action of the impeller, and part of the antifreeze is transmitted from the water inlet 6 to the crankcase 4. After further diversion at the crankcase 4, it enters different water pipes in the water circulation part 12. The antifreeze flows in the water pipes to reduce the temperature of the engine cylinder 1. The antifreeze liquid that flows through the water circulation part 12 reaches the crankcase 4, and then flows through the crankcase 4 and then flows out from the water outlet 7. The antifreeze liquid flows under the action of the water pump, and the antifreeze liquid cools the engine cylinder 1 under the joint action of the crankcase 4 and the water circulation part 12. In this embodiment, the pump body 3 of the engine water pump is directly fastened to the front surface of the cylinder 1 through the magneto cover 2, and the engine cylinder 1 is placed in the motorcycle. The arrangement of the pump body 3 at this position can reduce the space occupied by the engine cylinder 1 and reduce the space occupied by the engine. At the same time, the balance shaft 11 is extended and connected to the cylinder 1 with the reference surface of the pump body 3. The balance shaft 11 is driven and drives the impeller to rotate, so that the water pump drives the antifreeze liquid to flow and flow at the water inlet 6 and the water outlet 7. In the engine cylinder 1, the balance shaft 11 is arranged in the gap at the bottom of the cylinder 1, making full use of the gap in this part and improving the utilization rate of the space. The driving wheel 8, the driven wheel 10 and the impeller are closely connected to each other and are arranged as a whole in the chamber formed by the mounting hole 5 and the cavity of the pump body 3, further reducing the space occupancy rate. Outside the engine cylinder body 1, the magneto cover 2 is installed on the front surface of the cylinder body 1, and the pump body 3 is installed on the surface of the engine cylinder body 1 in close contact with the magneto cover 2, reducing the contour extension of the entire engine cylinder body 1. In this embodiment, the installation method of the water pump inside and outside the engine cylinder body 1 not only realizes the compactness of the installation structure, the connection method between different components of the water pump is simple, but also reduces the installation cost of the water pump installed on the engine cylinder body 1.

Claims

1. An engine water pump, the engine comprising a cylinder block and a water pump, characterized in that: It includes a pump body and a magneto cover, wherein the magneto cover is arranged on the front side of the cylinder surface, the magneto cover is provided with a mounting hole, the pump body is connected to the mounting hole and is directly installed on the cylinder body, a balancing shaft is provided in the cylinder body, and the pump body is connected to the balancing shaft.

2. An engine water pump according to claim 1, characterized in that: A cavity is arranged at the connection between the pump body and the installation port, an impeller is arranged in the chamber formed by the cavity and the installation port, and a water inlet is also arranged on the surface of the pump body.

3. An engine water pump according to claim 2, characterized in that: A driving wheel is arranged at the edge of one end of the balancing shaft, a driven wheel is arranged above the driving wheel and meshes with the driving wheel, and a driven shaft is installed at the center of the driven wheel.

4. An engine water pump according to any one of claims 1 or 2, characterized in that: A water inlet is arranged on one side of the installation hole, and a water outlet is arranged on the other side thereof, and the water outlet and the water inlet are connected to the pump body.

5. An engine water pump according to claim 3, characterized in that: The cross-sectional diameter of the driven shaft at one end away from the driven wheel is smaller than the cross-sectional diameter of the end close to the driven wheel. One end of the driven shaft is plugged into the center of the driven wheel, and the other end is plugged into the center of the impeller.

6. An engine water pump according to claim 3, characterized in that: A water circulation part is arranged on the side of the cylinder body, and the water circulation part includes a plurality of water pipes and a cooling assembly. A crankcase is arranged between the water circulation part and the water pump, and the water pump is connected to the water circulation part via the crankcase.

7. An engine water pump according to claim 6, characterized in that: A transmission wheel is provided at the other end of the balancing shaft, and the transmission wheel is arranged below the waterway pipeline.

8. The engine water pump according to claim 1, characterized in that: The edge of the magneto cover is provided with a plurality of fastening openings, and fasteners are arranged in the fastening openings to connect the magneto cover with the cylinder body.

Images